Improvement in steam-boilers



v UNITED STATES PATENT OFFICE'.

SAMUEL HOYT, OF :NEW YORK, N. Y.

iMPRovEM ENTV 'IN1 STEAM-BOILERS.

Specification forming part of Lettersl Patent No. 40,563, dated November 10, 1863.

.To all whom it. 11mg/ concern.:

Be it known that I, SAMUEL HoY'r,-of the city of NewYork, county, and lState of New' York, have invented certain'new and useful Improvements in Fluted I.or Corrugated Steam- Boilers; and Ido hereby declare that the t'ollowing is a full', clear, and exact description thereof', reference being had to the'accompan ying drawings, making a part ot' this specification, in whichp .l v

Figure 1 is a longitudinaljvertical central section through my improved steam-boiler. Fig. 2 is a horizontal sectionthrough the boiler. Fig. 3 is a view of the interior ofthe boiler, as Aseen 'by removing the iront plate. Fig. 4 is an elevation of .the rear'en'd. of the boiler. lFig. 5 is a perspective view Aot' the improved boiler.

Similar letters of reference indicate corresponding parts. in the several figures.

The object of my invention is to construct a steam-boiler which shall possess the advantages of a corrugated or iiuted surface at such points as are exposed to the heat of the furnace, and also of a plain, uncorrugated surface at such points asv are not thus exposed. It also has for its object yincreasin g the heating-surface of the iiues whichl pass through the boiler-shell; also, increasing the capacity ofthe ire-box, and finally, appl yin gfheat more directly to the sides of the boiler, alll as will be hereinafter described.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

The boiler-shell may be constructed of any desirable form, butl the cylindrical form is best, audit may be made up of anumber of plates riveted together.l This shell. A -is subjected to the actionA of' corrugatingA Aor liiuting rollers or dies, and one-half, or more Vor less, of the shell is tluted, as shown at a' a -in Fig. 3. vThese corrugations extend longitudinally from one extreme end to the other of the shell, leaving a plain or uncorrugated vsurface, I), which forms the top or dome of the boiler. By thus partially corrugatin g the boiler-shell I obtain an increased heating-surface over the plain boilers, and a diminished heat-'radiatin g surface over the corrugated boilers-.that is to say, the steam which rises to the top of the boiler will not be exposed to a rapidly-cooling surface, which-would not be the case if t-he shell A was wholly corrugated.

The heads c c of the shell A are applied in the usual manner ot' constructing tinted or Icorrugated boilers, and these heads are punched out for the recept-ion of the ends of the lues B U C. The central due tube,B, is corrugated, and so also are the two side iiues, C (J, which latter are in the form of sections of a circle concentric with the axis of the boiler, and the upper ytermini ofw which are just below the water-line.

Surrounding the rear ends oi the three lues B O C is a flue-box, D, which is partially surrounded by the rear projecting end of the corrugated flue-jacket E. This jacket E forms a line-space around that portion 'of the boilershell which is corrugated, and, extending forward about two-thirds of the length of the boiler, this jacket-E flares outward, terminating in a fire-box, G, 'f a cycloidal form, in cross-sections, as shown in Fig. 3. This corrugated jacket, with its enlarged tire-chamber, incloses only that portion of the boilershell which is corrugated, and which it is desired to subject to the action of heat, leaving the uncorrugated surface of the shell uncov ered. The iiues B C G communicate at their front ends with chambers d d d', from which the products of combustion pass .directly oii' into the smoke pipe H, as shownfin Fig. 1. The heated gases and smoke will thereforepass to the'back ofthe boiler, thence forward through the three iues B OC, finally escaping` from the smoke-pipe, as indicated by the course of the arrows in Figs. 1 and 2. The

enlarged arin g portion of the jacket E, which` v constitutes the tire-chamber G,is -of such a size as to admit of grates g g being' arranged in it, leaving a space between-the inner edges of the grates and-the boiler-shell for-the free upward passage of the iiames and' heated gases from the main tire below. These grates g g incline downward from the boiler and form auxiliary fire-chambers J J on Veach side of the boiler for augmenting the heat at these points, while the main fire-chamber Gr', be. neath the boiler, supplies its heat to the bottom thereof. l

From the above description it will be seen1 that I obtain all the advantages of the corru gated oriiuted boilers inlhavin gian increased heatingsurface, and at the same time I avoid the disadvantages of such boilers by having a greatly diminished cooling-surface. The

heating-surface is increased Wherev it is 'exposed tothe fire and heated products ot' combustion, while the surfacefwhich is exposed l boiler, and occupy very little space laterally.

The boiler` is supplied with Water by means of the feed-pipe k, entering the frontl head of the same, as shown in Figs. land 5, and the -steam is conducted 'oft' through steam-pipes m min the usual manner.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. Constructing the shell of a steam-boiler with.4 that portion of its surface which is exposed to the tire and heat corrugated, and that portion which is not thus exposed plain `or `uncorrugated,"substantially as described.

2. Combining witha partiallyicorrugated boiler-shell the corrugated jacket E, so applied.` thereto that it forms aflue-space, inclosesthatportionof the boiler-shell which is corrugated, and communicates with the internal' fines, B UC, substantially as described.

3. The-auxiliary fire-chambers J J ,in combination wit-li the main irechamber G and Haring-jacket E, substantially as and for the purposes described.

4. The combination of the internal curved lues, C. C, with the central circular flue, B, substantially as described.

Witness my hand in the matter oi my appl cation for a patent for iluted and corrugated iiue-boilersthi's 3d day of September, 1863. .SAMUEL HOYT.

Witnesses:

R. W. FENWIGK, R. T. GAMrBELL.' 

